An extensive report from the Environmental Protection Agency found that including ethanol into the U.S. gas supply is wreaking havoc on the atmosphere and soil.

In a study titled “Biofuels and the Environment: The Second Triennial Report to Congress,” the Environmental Protection Agency (EPA) determined that ethanol derived from corn and soybeans is causing serious harm to the environment. Water, soil and air quality were all found to be adversely affected by biofuel mandates. ... Essentially, the study found that biofuel mandates are boosting production of corn and soybeans.

Large-scale production of these crops is causing environmental degradation.

The EPA also found that — at least in some instances — using ethanol in lieu of gasoline resulted in worse air emissions.

So we've got laws on the books that do more harm that good. It's time for Trump to do a 180 on that promise and for Congress to change the law.